Internal-combustion engine



oct. 16, 192s( 1,687,917

L. M. WOOLSON INTERNAL COMBUSTION ENGINE Filed July 2,v 1925 Patented oef. 16, 1928. e

LIONEL M. WooLsoN, oFf'nETRoIT', MIcHIGAm-Ajss'IGNoRo PACxARDjMo'roR cAncoim' 4 Y PANE?,` or nETRoIfI,` MICHIGAN,

A CORPORATION for" MICHIGAN.

INTERNAL-COMBUSTION ENGINE? Application lfiled i iTuly 2,

This invention relates to internalucom`- i bustion engines,Y andpertcularly to the conpiston onthe olth- Most o'l" the yaircraft.engines'louilt today` are of the multi-cylinder type setlist if' a few ounces reduction of Weightcan he inode in the parts that -go'to makeup e: cylinder unit.v that reduction multiplied byr the number of cylinde and Vthertotai reduction may be several pounds. The presentinvention is directed to the'reduction of* Weight and strengthening of the .connecting rod parts oi" an engine so that greater power per pound may he produced, fand, greater strength and, consequently, reliability ef- Ipected.V

ther objects and advantages of thein- Vention will appear from the following description teken in coA nection with the drewings, which forni a part ofthis specification, and. in which: f

l `is e Vertice". transverse section an internal combustion engine ein-fV l invention; y f

' the f is a vre I substantially on the line oFig-.lgzindv` i u 3 is e View substantially .on the line of Fig. 2. c

Referring to the of an internal` combustion engine, and 1l is` the bottoni pan or cover which isl properly secr ed thereto to "forni-an enclosure or'the engine crank shaft. The 'citelnl shaft indicatedatl2 and is mounted in suitable hear- L in 'the crank A suitable bear ing cap 13' is detachahly secured in place as shown. f

The engine shown is of the V type, and one of the cylinders is indicated at 14, being supported on the crank cese and secured thereto es by bolts l5. One of the pistons drawing', l@ `represents the main supporting part of the 'crank case 1e is' shwii in' the yiiiiefifeena-'it will' te I understood that tliie'fis 4another cylinder eide ofthe enginemomf-:

'degrees trein' the een;

ter lineof the cylin ershoivnf between jnijpisibnifle ndrfhgfcmniqgin is;y of the 'crankshaftfl "This ,connecting rod iris' pivot-.illy conn @tedio chepin 16 asby ,Y al` piston' pin 19, and lit, adapted' to' ,been 65 of Ythe connecting rod 1T has a capl 2Q which;` is det'c'hably'securedto it and suitable'bearf. i ing: letal' 21 is castor' 'otherwse'securd in "lo the. 'nne'cting rod 'and cap w/vlie're those parts' surround thecrank pinlS f p 'i lnFig.' 2 the crank pin 18 isshown in 'some' es vat 22, lto provide al'ifoill reservoir; the end/sf 75 of the `reservoir being ,closed 'by disks 2.3 con;` nect'ed byu bei@ 24', The reservoir@ is fedwith oil underv pressure Iy Iaspripe or condiiitm more oilr feed` conduits'Q are formedfradif' i elly in the crank' pin, 148,',tl1usleading the 'oill v' to thecrzink pin hearing. 1 In order that the; bigendof the 'connect-*- ing md -17fand`ns cap 2o may be .formed of 8,5'

aslittle. vinetel :possible Vto Itheretovv ineke them 1 ight,'t-he"cap is secured Ont e conf; nectingrod end bymezins of studs 27, whichy studs are threidedfinto the lconnectingrod the outer'eiid 31l istln'eadedto receive anut r,for securln'gl 4the cap ,inplace vBytll'us permanently securing tliestuds 27 in' the end 95 of the connecting roclpthe useof' additional dowel pins `is dispensed With; and the use o1 heads' on'the Vusual bolts'isavoided." Also,

when'headedl bolts are usedifor securin"the clap in pl ce,` much larger'counter-sinkingr is 100 required Yin theA connecting rod end,V andthus the connecting vrod isi greatlyweakened, nnd in order to prevent weakening ot' the connectingr rod, it must be made Inuch heavier.

Allthree of these pointsmake for lightness `1.05

in the connecting rod of the `present construction. n Y

The big end of the connecting rodr17 is formed with an unbroken vor solidV integral eye 33 Which is adapted to receive a `cross pin 110 60 A. conn'ecting'rod k1.7i isfshoviineX'tending l 34 which is of vhollow open ended construction andthus easily carbonized. 'Ihe cross pin 34 extends beyond the sides Vof the eye 33 and is retained or secured in place in the eye, both against rotation and I end-wise jecting parts of the cross pin 34, suitable bearing `sleeves or bearing metal 40 being provided as shown in Fig. 2. These parts are assembled by alining the openings in the forked end of the connecting rod 38 with the opening of the eye 33 and then inserting the cross pin 34 andsecuring the latter in place in the Veye 33 by means of the tapered pin `Oil'conduit means in the form of drilled openings 41 are provided in the end of the connecting rod 17, this conduit means leading to the interior of the eye 33and connecting with the drilled opening Q6 in the crank pin at each revolution of the connecting rod on the crank pin.y For the purpose of lubricating the bearings of the forked end of the connecting rod 38 on the cross pin 34, thelatter is provided with two diagonally arranged conduits 42 which extend from thev outlets of the conduit means 41 to the bearings of the connecting rod 38. Thus these' bearings are fully lubricated without the added weight of closing disks ,for the ends of the cross pin 34.

By thussecuringthe cross pin 34 in anv unbrokeneye formed on the connecting rod end, the amount of metal in the eye itself and the adjacent parts of the connecting rod maybe considerably cut down, thereby lessening the total weight of Vthe connecting rod, and the thickness of the eye may be made less because it is not necessary to have an oscillating bearing in it. All o f this may bey done without lessenin g the amount of bearing surface for the Y connecting rod 38 on the cross pin34 so that there is no sacrifice of reliability in this respect.

VWhile I have herein described inl some detail a specific embodiment of my invention, which I deem to be new and advantageous and may specifically claim, I do not desire it to Qbe understood that my invention is limited to the exact details of the'constrnction, as it will be apparent that changes mayl be made therein Without departing from the spirit'or scope or my invention.

WVhat is claimed is: n g j v Y 1. In an internal combustionengine, the combination of a crank shaft having a crank pin, a connecting rod having an end adapted to bear on said crank pin, a. bearing cap for said end of the connecting rod, studs threaded into said end ofthe connecting rod and riveted in place, said studs forming dowels for said cap, and Vnuts for said vstuds for retaining the cap in place on the connecting rod end. Y

2. In an internal combustion engine, the combination of a connecting rod having an end adapted to bear on theengine crank pin, said end having an integral eye thereon, a erosspin secured against rotation in said eye, and projecting from the sides thereof, a second connecting rodhaving a forked end pivoted on the projecting ends of said cross pin, oil channel means through a wall of said eye to the exterior of the crosspin, and an oil tube extending from said channel means to the bearing of said second connecting rod on theprojecting end of said pin.

3. In'an internal combustion engine, the combination of a connecting rod having an end adapted to bear on the engine crank pin, said end having an integral eye thereon, a cross-pin secured against rotation in said eye, and projecting from thev sides thereof, a second connecting rodhaving a forked end pivoted on the projecting ends of said Vcross pin, oil channel means through awall of said eye to the exterior of the cross pin, and diagonally arranged oil tubes in said cross pin extending from said channel means to the forked end bearing of said secondV connecting rod on the ends of saidvcross pin.

. 4. In an internal combustion engine, theV combination of a connecting rod having an end adapted to bear on the engine crank pin, said end having an integral eye formed thereon, a 'hollow open ended cross pin secured against rotation in said eye, a second connecting rod having a forked end bearing on the cross pin on both'sides of said eye, oil conduit means in the connecting rod leading to the interior of said eye, and pipes in the cross pin extending from said conduit means tothe bearing of the second connecting rod on said cross pin.

In testimony whereof I affix'my signature.

LIONEL M. WQOLSON.

Yse 

